vxk-b.qxd 10.11.30 11:55 am page 1 2 port …12 apparent power (va)∗ 55 60 65 temperature rise (c...

Built-in strainer enabling the removal of contaminants

Built-in strainer enabling the removal of contaminants

�

� Restriction of environmentally hazardous substances RoHS compliant

� IP65�[Application pending]

60 mm63.5 mm

(VXK21)

(VXK22/23)

Space saving and reduced piping labor



Strainer(100 mesh)

Series VXKCAT.ES70-34B

2 Port Solenoid Valvewith Built-in Y-strainerFor Air, Water, Oil, Steam

VXK-B.qxd 10.11.30 11:55 AM

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

Direct Operated: Series VXK21/22/23

∗ Basic specifications are the same as those of the VX21/22/23 series.

� Variations

Elem

ent c

anbe replaced without removing piping.El

emen

t can

be replaced without removing piping.

Strainer

O-ring

Plug

Electrical Entry

Grommet

Conduit

DIN terminal

Conduit terminal

Rated VoltageAC: 100 V, 200 V, 110 V, 220 V, 240 V

230 V, 48 V

DC: 24 V, 12 V

MaterialBody: C37

Seal: NBR, FKM, EPDM, PTFE

Solenoid CoilCoil: Class B, Class H

Normally closed (N.C.)

Normally open (N.O.)

Valve

Model

Port size

2 mmø

3 mmø

4.5 mmø

6 mmø

VXK21��—

1/8, 1/4

VXK22—

��

1/4, 3/8

VXK23—

��

1/4, 3/8

Normally Open (N.O.)

Model

Port size

2 mmø

3 mmø

4.5 mmø

6 mmø

8 mmø

VXK21��—

—

1/8, 1/4

VXK22—

��

1/4, 3/8

VXK23—

��

1/4, 3/8

Normally Closed (N.C.)

Orif

ice

size

Orif

ice

size

Features 1

VXK-B.qxd 10.11.30 11:55 AM


Direct Operated 2 Port Solenoid Valvewith Built-in Y-strainer

For Air, Water, Oil, SteamSeries VXK21/22/23

� Electrical Entry• Grommet• Conduit• DIN terminal• Conduit terminal

� Rated Voltage100 VAC, 200 VAC, 110 VAC, 220 VAC, 240 VAC, 230 VAC, 48 VAC, 24 VDC, 12 VDC

� MaterialBody C37Seal NBR, FKM, EPDM, PTFE

� Solenoid CoilCoil: Class B, Class H

Single Unit

Normally closed (N.C.)Normally open (N.O.)

� Valve Normally Closed (N.C.)


Model

Port size

2 mmø3 mmø

4.5 mmø6 mmø8 mmø

VXK21

1/81/4

VXK22

1/43/8

VXK23

1/43/8

Model VXK21 VXK22 VXK23

Port size

2 mmø3 mmø

4.5 mmø6 mmø

1/81/4

1/43/8

1/43/8

Orif

ice

size

Orif

ice

size

1

Spec

ifica

tions

Fo

r A

irFo

r Ste

amDi

men

sions

Cons

tructi

onFo

r Wat

erF

or

Oil

VXK-B.qxd 10.11.30 11:55 AM


Strainer specifications

MeshMaterial

Solenoid Coil Specifications

VXK21VXK22VXK23

Model 4.5 7 10.5

Power consumption (W)454560

Temperature rise (C°) Note)

DC Specification

∗ There is no difference in the frequency and the inrush and energized apparent power because a rectifying circuit is used in the AC (Class B, Built-in full-wave rectifier type).

Note) Value at ambient temperature of 20°C and when the rated voltage is applied.



VXK21VXK22VXK23

Model7 9.5

12

Apparent power (VA)∗556065


AC Specification (Class B, Built-in full-wave rectifier type)

∗ There is no difference in the frequency and the inrush and energized apparent power because a rectifying circuit is used in the AC (Class B, Built-in full-wave rectifier type).


VXK21VXK22VXK23

Model7 9.5

12

Apparent power (VA)∗556065


AC Specification (Class B, Built-in full-wave rectifier type)

VXK21

VXK22

VXK23

Model

10 820173227

Apparent power (VA)Energized

191643356252

506050605060

InrushFrequency (Hz)504565606560

Temperaturerise (C°) Note)

AC Specification


VXK21VXK22VXK23

Model 4.5 7 10.5

Power consumption (W)454560


DC SpecificationNormally Open (N.O.)

VXK21

VXK22

VXK23

Model

11 820183227

Apparent power (VA)Energized

221846386454

506050605060

InrushFrequency (Hz)555065606560

Temperaturerise (C°) Note)

AC Specification

Common SpecificationsStandard Specifications

Valvespecifications

Coilspecifications

Valve constructionWithstand pressureBody materialSeal materialEnclosureEnvironment

MPa

∗ Electrical entry: Grommet with surge voltage suppressor (GS) has a rating of IP40.

Direct operated poppet5.0C37

NBR, FKM, EPDM, PTFEDust-tight, Water-jet-proof type (IP65) Note)

Location without corrosive or explosive gases100

Stainless steel100 VAC, 200 VAC, 110 VAC, 220 VAC, 230 VAC, 240 VAC, 48 VAC

24 VDC, 12 VDC±10% of rated voltage

10% or less of rated voltage20% or less of rated voltage2% or less of rated voltage

Class B, Class H

Rated voltage

Allowable leakage voltage

Coil insulation type

Allowable voltage fluctuation

ACDC

AC (Class B, Built-in full-wave rectifier type)AC (Class B/H)

DC (Class B only)

2

VXK-B.qxd 10.11.30 11:55 AM


102

Note 1) The leakage amount (10–6 Pa·m3/s) of the option “V” is a value when the differential pressure is 0.1 MPa.Note 2) Option “V” is the oil-free treatment.Note 3) The dynamic viscosity of the fluid must not exceed 50 mm2/s.

The special construction of the armature adopted in the built-in full-wave rectifier type gives an improvement in OFF response by providing clearance on the absorbed sur-face when it is switched ON.Select the DC spec. or AC spec. built-in full-wave rectifier type when the dynamic viscosity is higher than water or when the OFF response is prioritized.

Note 4) Coil insulation type Class H: AC spec. onlyNote 5) There is no shading coil attached to the DC spec. or AC spec. built-in full-wave rectifier type.

∗ Please contact SMC when fluids other than above are used.

VXK2

NBR

FKM

NBR

EPDM

FKM

PTFE

EPDM

PTFE

C37/–

C37/–

C37/Cu

C37/Cu

C37/Cu

C37/Cu

C37/Cu

Select the built-in full-wave rectifier type for AC spec.

Select the built-in full-wave rectifier type for AC spec.

B

B

B

H

B

H

H

B

NilV

NilEADSBC

Note 2)

Option symbol

Fluid and applicationOptionsymbol

Seal materialBody/Shading

coil material Note 5) RemarksCoil insulationtype Note 4)

Air

Water

Heated water

Oil Note 3)

Steam

Other combinations

Medium vacuum, Non-leak, Oil-free Note 1)

Applicable Fluid Check List

3

All Options (Single Unit)

Spec

ifica

tions

Fo

r A

irFo

r Wat

erF

or

Oil

For S

team

Dim

ensio

nsCo

nstru

ction

VXK-B.qxd 10.11.30 11:55 AM


2

1

Passage symbol Passage symbol

Portsize

Orificesize

(mmø)Model

Max.operatingpressure

differential(MPa)

1.50.60.21.50.61.53.00.20.350.90.150.350.080.21.53.00.350.90.150.350.080.2

23

4.52

3

4.5

6

8

3

4.5

6

8

Max.system

pressure(MPa)

3.0

3.0

1.0

1.0

1/8(6A)

1/4(8A)

3/8(10A)

0.59 1.2 2.3 0.59 1.2

2.3

4.0

4.9

1.2

2.3

4.0

4.9

C[dm3/(s·bar)]0.480.450.460.48

0.45

0.46

0.30

0.29

0.45

0.46

0.30

0.29

b0.180.330.610.18

0.33

0.61

1.10

1.20

0.33

0.61

1.10

1.20

Cv

Flow characteristics


Portsize

Orificesize

(mmø)Model


differential(MPa)

Max.system

pressure(MPa)

23

4.52

3

4.5

6

3

4.5

6

3.0

500

0.591.22.30.59

1.2

2.3

4.0

1.2

2.3

4.0

C[dm3/(s·bar)]0.480.450.460.48

0.45

0.46

0.30

0.45

0.46

0.30

b0.180.330.610.18

0.33

0.61

1.10

0.33

0.61

1.10

Cv

Flow characteristics


2

1

VXK2110-01VXK2120-01VXK2130-01VXK2110-02VXK2120-02VXK2220-02VXK2320-02VXK2130-02VXK2230-02VXK2330-02VXK2240-02VXK2340-02VXK2250-02VXK2350-02VXK2220-03VXK2320-03VXK2230-03VXK2330-03VXK2240-03VXK2340-03VXK2250-03VXK2350-03

480

VXK2112-01VXK2122-01VXK2132-01VXK2112-02VXK2122-02VXK2222-02VXK2322-02VXK2132-02VXK2232-02VXK2332-02VXK2242-02VXK2342-02VXK2222-03VXK2322-03VXK2232-03VXK2332-03VXK2242-03VXK2342-03

1.50.70.31.50.71.01.60.30.450.80.250.451.01.60.450.80.250.45

640790480640790640790640790640790640790640790640790

670830500670830670830670830670830670830

N.O.

1/8(6A)

1/4(8A)

3/8(10A)

Model/Valve Specifications

(Inert gas, Non-leak, Medium vacuum)

For Air /Single Unit

N.C.

When you operate the VXK series (AC spec.) by air, the built-in full-wave rectifier type is chosen.• The special construction of the armature reduces abrasion, result-

ing in a longer service life.• Noise reduction

Best suited for medical equipment, low-noise environments, etc.

Fluid: Air

Weight(g)

Note)

Weight(g)

Note)

Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.

• Refer to “Glossary of Terms” on page 23 for details on the max. oper-ating pressure differential and the max. system pressure.

• If you intend to use any of the solenoid valves at the rated max. oper-ating pressure for the AC spec. with shading coil, please contact SMC beforehand.

Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.


Ambient and Fluid Temperature

Note) Dew point temperature: –10°C or less

Ambient temperature(°C)

–20 to 60Nil

Fluid temperature (°C)Solenoid valve option symbol

–10 Note) to 60V

–10 Note) to 60

Valve Leakage

NBR, FKM

Seal materialLeakage rate

Air

1 cm3/min or less

Non-leak,Medium vacuum Note)

10–6 Pa·m3/sec or less

Internal Leakage

NBR, FKM

Seal materialLeakage rate

Air

1 cm3/min or less

Non-leak,Medium vacuum Note)

10–6 Pa·m3/sec or lessNote) Value for option “V” (Non-leak, Medium vacuum)

External Leakage

4

Series VXK21/22/23

VXK-B.qxd 10.11.30 11:55 AM


Port sizeRefer to the Table (1)

shown below for availability.

Thread typeNilTFN

RcNPTF

GNPT

VXK 221 01VXK 221 01

ModelRefer to the Table (1)


Solenoid valve optionRefer to the Table (2)


SuffixNilZ

—

Oil-free

Nil

V

NBR

FKMC37 B

123478J56

100 V200 V110 V220 V240 V48 V

230 V24 V12 V

VXK21 VXK22 VXK23

1G1G

R15

Orifice sizeRefer to the Table (1)


Electrical entryG -GrommetGS-With grommet surge

voltage suppressor

C-Conduit

T -With conduit terminalTS -With conduit terminal and

surge voltage suppressorTL -With conduit terminal

and lightTZ -With conduit

terminal, surgevoltage suppressor and light

D -DIN terminalDS -DIN terminal with surge

voltage suppressorDL -DIN terminal with lightDZ -DIN terminal with

surge voltage suppressor and light

DO-For DIN terminal (without connector, gasket is included.)

∗ DIN type is available with class B only.

Select nil because the solenoid valve option “V” is the oil-free treatment.

∗ Refer to the Table (3) for the available combinations between each electrical option (S, L, Z) and rated voltage.

∗ Option “S”, “Z” are not available because a surge voltage suppressor is integrated into the AC/Class B, built-in full-wave rectifier type as a standard.

AC

DC

Valve/Body configuration02

N.C./Single unitN.O./Single unit

00

Built-in full-wave rectifier type

BracketNilB

NoneWith bracket

∗ Packed in the same container as the main body.

∗ Refer to the Table (4) when a bracket is ordered separately.

∗ When using with vacuum, consider the max. differential pressure. (0.1 MPa or more is recommended.)

VXK21VXK22VXK23

How to Order (Single Unit)

Rated voltage12345

100 VAC 50/60 Hz200 VAC 50/60 Hz110 VAC 50/60 Hz220 VAC 50/60 Hz

24 VDC

678J

12 VDC240 VAC 50/60 Hz48 VAC 50/60 Hz

230 VAC 50/60 Hz

∗ Refer to the Table (3) shown below for availability.

Refer to page 14 for ordering a coil only.

Table (1) Model/Orifice Size/Port SizeNormally Closed (N.C.) Table (3) Rated Voltage/Electrical Option


Table (4) Bracket Part No.Table (2) Solenoid Valve Option

Model

Portsymbol

(Port size)

Model

Portsymbol

(Port size)

Optionsymbol

Sealmaterial

Bodymaterial

Coilinsulation type Remarks

Solenoid valve (Port size) Orifice symbol (Diameter)

Solenoid valve (Port size) Orifice symbol (Diameter)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)

VXK21 VXK22 VXK23

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)

1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

5(8 mmø)

Non-leak (10–6 Pa·m3/sec), Oil-free,Medium vacuum (0.1 Pa.abs)

When you operate the VX series (AC spec.) by air, the built-in full-wave rectifier type is chosen.• The special construction of the armature reduces abrasion, resulting in a longer service life.• Noise reduction

Best suited for medical equipment, low-noise environments, etc.Dimensions → page 13 (Single unit)

Model Part no.

VXK021N-5A


AC/DC

AC

DC

Rated voltage

Voltagesymbol

VoltageWith surge

voltagesuppressor

SClass B

Withlight

LWith light andsurge voltagesuppressor

Z

Fluid: Air

Connector

5

Series VXK21/22/23Direct Operated 2 Port Solenoid Valvewith Built-in Y-strainer

For Air/Single Unit

Spec

ifica

tions

Fo

r A

irFo

r Wat

erF

or

Oil

For S

team

Dim

ensio

nsCo

nstru

ction

VXK-B.qxd 10.11.30 11:55 AM


2

1


0.170.330.610.17

0.33

0.61

0.95

1.10

0.33

0.61

0.95

1.10

23

4.52

3

4.5

6

8

3

4.5

6

8


2.00.90.42.00.91.72.50.40.60.850.350.550.130.171.72.50.60.850.350.550.130.17

1.50.50.21.50.51.53.00.20.350.90.150.30.080.21.53.00.350.90.150.30.080.2

3.0

3.0

1.0

1.0

480

4.1 7.915.0 4.1

7.9

15.0

23.0

26.0

7.9

15.0

23.0

26.0

Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, and 60 g for conduit terminal type respectively.


23

4.52

3

4.5

6

3

4.5

6


3.0

500

670830500670830670830670830670830670830

0.9 0.450.20.90.450.81.20.20.30.60.150.350.81.20.30.60.150.35



4.17.9

15.04.1

7.9

15.0

23.0

7.9

15.0

23.0

0.170.330.610.17

0.33

0.61

0.95

0.33

0.61

0.95

Nil E

2

1

640790480640790640790640790640790640790640790640790

For Water /Single UnitModel/Valve Specifications

N.C. N.O.

Normally Closed (N.C.) Normally Open (N.O.)

Portsize

Orificesize

(mmø)Model

ACDC

AC (Built-infull-wave

rectifier type)

Max. operating pressuredifferential (MPa)

Weight(g)

Max.system

pressure(MPa)

1/8(6A)

1/4(8A)

3/8(10A)

Av x 10-6 m2 Cv converted

Flowcharacteristics

Note)Portsize

Orificesize

(mmø)Model


differential(MPa)

Max.system

pressure(MPa)

Weight(g)


Flowcharacteristics

1/8(6A)

1/4(8A)

3/8(10A)

Note)


–20 to 60


1 to 60 1 to 99

Note) With no freezing

Ambient and Fluid Temperature Valve Leakage

Internal Leakage

External LeakageNBR, EPDMSeal material Leakage rate (Water)

0.1 cm3/min or less

NBR, EPDMSeal material Leakage rate (Water)

0.1 cm3/min or less

6

Series VXK21/22/23

VXK-B.qxd 10.11.30 11:55 AM


1 101 G5 101 G

RVXKAC 21VXKDC 21

NilE

NBREPDM

C37/CuBH

TFN

12345

678J

Z

VXK21 VXK22 VXK23

VXK21 VXK22 VXK23

22

00

02

123478J56

100 V200 V110 V220 V240 V48 V

230 V24 V12 V

S L Z S L Z VXK21VXK22VXK23



Valve/Body configurationN.C./Single unitN.O./Single unit



Solenoid valve optionRefer to the Table (2) shown below for availability.

SuffixNil —

Oil-free

Oil-free, AC/Class B: Built-in full-wave rectifier type only. Select the built-in full-wave rectifier type.



Thread typeNil Rc

NPTFG

NPT

Rated voltage100 VAC 50/60 Hz200 VAC 50/60 Hz110 VAC 50/60 Hz220 VAC 50/60 Hz

24 VDC

12 VDC240 VAC 50/60 Hz48 VAC 50/60 Hz

230 VAC 50/60 Hz



BracketNilB

NoneWith bracket

∗ Packed in the same con-tainer as the main body.

∗ Refer to the Table (4) when a bracket is ordered sepa-rately.

Full-wave rectifierNil

R

None

Built-in full-waverectifier type(Class B only)


voltage suppressor

C-Conduit









Connector




Optionsymbol

Sealmaterial

Body/Shadingcoil material

Coilinsulation type

Remarks

Table (2) Solenoid Valve Option

Heated water (AC only)—

Model Part no.Table (4) Bracket Part No.

VXK021N-5A

Dimensions → page 13 (Single unit)

Table (3) Rated Voltage/Electrical Option

AC/DC

AC

DC

Rated voltage

Voltagesymbol

VoltageWith surge

voltagesuppressor

Class B

Withlight

With light/surge voltagesuppressor

With surgevoltage

suppressor

Class H

Withlight


DC spec. is not available.


Normally Open (N.O.)Solenoid valve (Port size)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)

1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

Orifice symbol (Diameter)

Model

Portsymbol

(Port size)

Table (1) Model/Orifice Size/Port SizeNormally Closed (N.C.)

Solenoid valve (Port size)

Model

Portsymbol

(Port size)


1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

5(8 mmø)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)


7

Spec

ifica

tions

Fo

r A

irF

or

Oil

For S

team

Dim

ensio

nsCo

nstru

ction

For W

ater


For Water/Single Unit

VXK-B.qxd 10.11.30 11:55 AM


2

1


23

4.52

3

4.5

6

8

3.0

1.0

480

640790480640790640790640790640790640790640790640790

4.1 7.915.0 4.1

7.9

15.0

23.0

26.0

7.9

15.0

23.0

26.0

0.170.330.610.17

0.33

0.61

0.95

1.10

0.33

0.61

0.95

1.10

670830500670830670830670830670830670830

23

4.52

3

4.5

6

3

4.5

6


500

4.17.9

15 4.1

7.9

15

23.0

7.9

15

23.0

0.170.330.610.17

0.33

0.61

0.95

0.33

0.61

0.95

2

1

0.80.450.20.80.450.71.00.20.30.60.150.350.71.00.30.60.150.35

3.0

N.C. N.O.

A D

3

4.5

6

8


3.0

1.0

1.50.50.21.50.51.21.70.20.350.550.20.350.10.141.21.70.350.550.20.350.10.14

1.50.50.151.50.51.22.00.150.30.850.10.30.080.21.22.00.30.850.10.30.080.2


For Oil /Single Unit

The dynamic viscosity of the fluid must not exceed 50 mm2/s.The special construction of the armature adopted in the built-in full-wave rectifier type gives an improvement in OFF response by providing clearance on the absorbed surface when it is switched ON.Select the DC spec. or AC spec. built-in full-wave rectifier type when the dynamic viscosity is higher than water or when the OFF response is prioritized.

Fluid: Oil

Portsize

Orificesize

(mmø)Model Weight

(g)

Max.system

pressure(MPa)

1/8(6A)

1/4(8A)

3/8(10A)


Note)

ACDC

AC (Built-infull-wave

rectifier type)

Max. operating pressuredifferential (MPa)


Flowcharacteristics Port

size

Orificesize

(mmø)Model


differential(MPa)

AC, DC

Max.system

pressure(MPa)

Weight(g)


Flowcharacteristics

1/8(6A)

1/4(8A)

3/8(10A)

Note)





Ambient and Fluid Temperature Valve LeakageInternal Leakage

Note) Dynamic viscosity: 50 mm2/s or less


–20 to 60


–5 Note) to 60 –5 Note) to 120

FKMSeal material Leakage rate (Oil)

0.1 cm3/min or less

FKMSeal material Leakage rate (Oil)

0.1 cm3/min or less

External Leakage

8

Series VXK21/22/23

VXK-B.qxd 10.11.30 11:55 AM


Electrical entryTFN

12345

678J

VXK 2 121 01 GVXK 2 121 01 G

R15

ZNil Nil

AD

FKM C37/CuBH

VXK21 VXK22 VXK23

VXK21 VXK22 VXK23

123478J56

S L Z S L Z

AC

DC

02

00

AA

VXK21VXK22VXK23

VXK021N-5A



shown below for availability. Orifice sizeRefer to the Table (1) shown

below for availability.Valve/Body configuration



shown below for availability. Suffix—

Oil-free

Oil-free, AC/Class B: Built-in full-wave rectifier type only. Select the built-in full-wave rectifier type.



Thread typeRc

NPTFG

NPT


24 VDC

12 VDC240 VAC 50/60 Hz48 VAC 50/60 Hz

230 VAC 50/60 Hz



BracketNilB

NoneWith bracket


∗ Refer to the Table (4) when a bracket is ordered sepa-rately.

Full-wave rectifierNil

R

None

Built-in full-waverectifier type(Class B only)

G -GrommetGS-With grommet surge

voltage suppressor

C-Conduit









Connector




Table (4) Bracket Part No.

Table (2) Solenoid Valve OptionOptionsymbol

Sealmaterial

Body/Shadingcoil material

Coilinsulation type

Model Part no.




Model

01 (1/8)Port

symbol(Port size)


1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

5(8 mmø)

02 (1/4)02 (1/4)03 (3/8)

02 (1/4)03 (3/8)




1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)


Model

Portsymbol

(Port size)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)

AC/DC

AC

DC

Rated voltage

Voltagesymbol

VoltageWith surge

voltagesuppressor

Class B

Withlight


With surgevoltage

suppressor

Class H

Withlight


100 V200 V110 V220 V240 V48 V

230 V24 V12 V



The additives contained in oil are different depending on the type and manufacturers, so the durability of the seal materials will vary. For details, please consult with SMC.

9


For Oil/Single Unit

Spec

ifica

tions

Fo

r A

irFo

r Ste

amDi

men

sions

Cons

tructi

onFo

r Wat

erF

or

Oil

VXK-B.qxd 10.11.30 11:55 AM


S

2

1


640790640790640790

640

790640790640790

23

4.523

4.5

6

8

3

4.5

6

8

1.0

1.0

0.5

0.5

4.1 7.915.0 4.1 7.9

15.0

23.0

26.0

7.9

15.0

23.0

26.0

0.170.330.610.170.33

0.61

0.95

1.10

0.33

0.61

0.95

1.10

23

4.52

3

4.5

6

3

4.5

6

1.0

4.17.9

15 4.1

7.9

15

23.0

7.9

15

23.0

0.170.330.610.17

0.33

0.61

0.95

0.33

0.61

0.95

2

1

1.01.00.451.01.00.450.751.00.40.50.150.21.00.751.00.40.50.150.2

480

VXK2110-01VXK2120-01VXK2130-01VXK2110-02VXK2120-02VXK2130-02VXK2230-02VXK2330-02VXK2240-02VXK2340-02VXK2250-02VXK2350-02VXK2220-03VXK2230-03VXK2330-03VXK2240-03VXK2340-03VXK2250-03VXK2350-03

VXK2112-01VXK2122-01VXK2132-01VXK2112-02VXK2122-02VXK2222-02VXK2132-02VXK2232-02VXK2332-02VXK2242-02VXK2342-02VXK2222-03VXK2232-03VXK2332-03VXK2242-03VXK2342-03

1.00.70.31.00.71.00.30.450.80.250.451.00.450.80.250.45

500

670500670830670830

670

830670830

N.O.


For Steam /Single Unit

N.C.

Portsize

1/8(6A)

1/4(8A)

3/8(10A)

Orificesize

(mmø)Model

AC

Max. operatingpressure

differential (MPa) Weight(g)

Max.system

pressure(MPa)Av x 10-6 m2 Cv converted

Flowcharacteristics


Portsize

Orificesize

(mmø)Model

AC

Max. operatingpressure

differential (MPa)

Max.system

pressure(MPa)

Weight(g)Av x 10-6 m2 Cv converted

Flowcharacteristics

Note) Note)

1/8(6A)

1/4(8A)

3/8(10A)

Note) Weight of grommet type. Add 60 g for conduit terminal type.• Refer to “Glossary of Terms” on page 23 for details on the max. oper-

ating pressure differential and the max. system pressure.

Note) Weight of grommet type. Add 60 g for conduit terminal type.• Refer to “Glossary of Terms” on page 23 for details on the max. oper-

ating pressure differential and the max. system pressure.


Max. fluid temperature (°C)Solenoid valve option symbol

Ambient and Fluid Temperature Valve LeakageInternal Leakage

–20 to 60183

PTFESeal material Leakage rate (Air)

300 cm3/min or less

PTFESeal material Leakage rate (Air)

1 cm3/min or less

External Leakage

10

Series VXK21/22/23

VXK-B.qxd 10.11.30 11:55 AM


1234

78J

11 GVXKAC 221 01

S L Z

S PTFE C37/Cu H

VXK21 VXK22 VXK23

VXK21 VXK22 VXK23

G -GrommetGS-With grommet surge

voltage suppressor

C-Conduit



and lightTZ -With conduit terminal,

surge voltage suppressorand light

0 S


VXK21VXK22VXK23

VXK021N-5A






Valve/Body configuration02




SuffixNilZ

—

Oil-free

Port sizeRefer to the Table (1) shown below for availability.

Thread typeNilTFN

RcNPTF

GNPT


240 VAC 50/60 Hz48 VAC 50/60 Hz

230 VAC 50/60 Hz



BracketNilB

NoneWith bracket


∗ Refer to the Table (4) when a bracket is ordered separately.



AC/DC

AC

DC

Rated voltage

Voltagesymbol

123478J56

100 V200 V110 V220 V240 V48 V

230 V24 V12 V

VoltageWith surge

voltagesuppressor

Class H

Withlight



Model Part no.Table (4) Bracket Part No.



Table (2) Solenoid Valve OptionOptionsymbol

Seal material Body/Shadingcoil material

Coilinsulation type

Solenoid coil: AC/Class H only


Model

Portsymbol

(Port size)

1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)


(VXK22)(VXK22)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)

01 (1/8)02 (1/4)

02 (1/4)03 (3/8)

02 (1/4)03 (3/8)


Model

Portsymbol

(Port size)


1(2 mmø)

2(3 mmø)

3(4.5 mmø)

4(6 mmø)

5(8 mmø)

(VXK22)

Electrical entry

11


For Steam/Single Unit

Spec

ifica

tions

Fo

r A

irF

or

Oil

Dim

ensio

nsCo

nstru

ction

For W

ater

For S

team

VXK-B.qxd 10.11.30 11:55 AM


C37

Stainless steel, Cu

Stainless steel

—

NBR (FKM, EPDM, PTFE)

Stainless steel

Stainless steel, PPS, NBR (FKM, EPDM, PTFE)

C37

Stainless steel

C37


Note 1) The seal materials shown in ( ) are available depending on the option selected.

Note 2) “Cu” is not available with the DC spec. and AC spec. built-in full-wave rectifier type.

C37

Stainless steel, Cu

Stainless steel, PPS, NBR (FKM, EPDM, PTFE)

Stainless steel

—


SK

C37

Stainless steel

C37


Note 1) The seal materials shown in ( ) are available depending on the option selected.

Note 2) “Cu” is not available with the DC spec. and AC spec. built-in full-wave rectifier type.

Construction: Single Unit

Normally closed (N.C.) Normally open (N.O.)Body material: C37 Body material: C37

No. Description

Body

Tube assembly Note 2)

Armature assembly

Return spring

Solenoid coil

O-ring

Clip

Nut

Strainer

Plug

O-ring

1

2

3

4

5

6

7

8

9

10

11

Material No. Description

Body

Tube assembly Note 2)

Return spring

Solenoid coil

O-ring

E stop ring

Push rod assembly

Nut

Strainer

Plug

O-ring

1

2

3

4

5

6

7

8

9

10

11

Material

Component PartsComponent Parts

u

w

e

y

r

q

!0

!1

o

i

t

r

u

t

e

q

!0

w

i

o

!1

y

12

Series VXK21/22/23For Air, Water, Oil, Steam

VXK-B.qxd 10.11.30 11:55 AM


Dimensions

Normally closed (N.C.): VXK21�0/VXK22�0/VXK23�0Normally open (N.O.): VXK21�2/VXK22�2/VXK23�2

Grommet: G

Note 1) An orifice size of ø8 is only available with the N.C. spec.Note 2) (C)(E): N.O. spec. dimensionsNote 3) Add 1.5 mm to “J” and “L” dimensions for the N.O. spec.

Model

Orifice sizeNormallyclosed(N.C.)

Normallyopen(N.O.)

Port sizeH

A

182222

B C (C)

60 63.563.5

D

303540

E

60 69 75.5

(E)

67 76.583.5

F

19.522.525

G

273236

(112)(121.5)(127.5)

(119)(128.5)(135)

VXK21�0VXK22�0VXK23�0


ø2, ø3, ø4.5ø3, ø4.5, ø6, ø8 Note 1)

ø3, ø4.5, ø6, ø8 Note 1)

1/8, 1/41/4, 3/81/4, 3/8

Note 2) Note 2)

19.522.525.5

52 61 67.5

I J404346

44.553.560

I J58.561.564

I44 53 59.5

J46.549.552

K(92)(95)(98)

I44.553.560

J(61)(64)

(66.5)

K(129)(138)

(143.5)

L303336

48 57 63.5

I J48.551.554

43 52 58.5

I J65.568.571

I44 53 59.5

J53.556.559

K(100.5)(103.5)(106)

I43 52 58.5

J(69.5)(72.5)(75)

K(127)

(136.5)(142.5)

LVXK21�0VXK22�0VXK23�0


(mm)

(mm)

Conduit: C

Model

Orifice sizePort size

HNormallyclosed(N.C.)

Normallyopen(N.O.)

ø2, ø3, ø4.5ø3, ø4.5, ø6, ø8 Note 1)

ø3, ø4.5, ø6, ø8 Note 1)

1/8, 1/41/4, 3/81/4, 3/8

Electrical entry Note 3)

Grommet Conduit DIN terminal Conduit terminalBuilt-in full-wave rectifier type Electrical entry Note 3)

Grommet Conduit DIN terminal Conduit terminal

23

(E)

E14

14 34

42

KIF

B

A

D

E(E)

J

23(E

)14

KI

25

32J

(C)

C

E

F

42

14 34

B

23(E

)E

14

F

B

14 34

42

I ≈ 280

23

(E)

E14

14 34

73

25.5

F I ≈ 300

42

B

1622

85J

D26

A

1.6

Width acrossflats G

(C)

C A

D

(C)

C

Width acrossflats GJ

34

A(L)

G1/2

G1/2

2 x H

2 x ø5.3

31.5

(44)

Port size

Widthacrossflats G

2 x HPort size

2 x HPort size

Mounting hole

2 x ø5.3Mounting hole


Mounting hole2 x ø5.3


Width acrossflats 27



Width acrossflats G

2 x HPort size


Cable ø6 to ø12

DIN terminal: D Conduit terminal: T

13


For Air, Water, Oil, Steam

Spec

ifica

tions

Fo

r A

irF

or

Oil

Dim

ensio

nsCo

nstru

ction

For W

ater

For S

team

VXK-B.qxd 10.11.30 11:55 AM


123478J56

S L Z S L Z

125615

SLZ


� DIN Connector Part No.

GDM2AGDM2A

Without electrical option

With electrical option

Rated voltage100 VAC, 110 VAC200 VAC, 220 VAC, 230 VAC, 240 VAC24 VDC12 VDC48 VAC

Electrical optionWith surge voltage suppressorWith lightWith light/surge voltage suppressor


� Gasket Part No. for DIN Connector

VCW20-1-29-1

AC/DC

AC

DC

Rated voltage

Voltagesymbol

Voltage

100 V200 V110 V220 V240 V48 V

230 V24 V12 V

With surgevoltage

suppressor

Withlight


With surgevoltage

suppressor

Withlight


Class B Class H



∗ Replacement of solenoid coil• Cannot be changed between DC and AC.• Cannot be changed between DC and AC (built-in full-wave rectifier type).• Can be changed from DC to DC.• Can be changed from AC to AC.

1 1 GN

123

VXK21��VXK22��VXK23��

12345678J

VX02

Nil2

N.C.N.O.

1 1 GN R

123

ModelVXK21��VXK22��VXK23�� 1

23478J

VX02

Replacement Parts

� Solenoid Coil Assembly Part No. AC/Class B (Built-in full-wave rectifier)

Model

Rated voltage Note)

100 VAC 50/60 Hz200 VAC 50/60 Hz110 VAC 50/60 Hz220 VAC 50/60 Hz

24 VDC12 VDC

Note) Refer to the Table (1) for the available combinations.

NilH∗

Coil insulation type Note)

Class BClass H

∗ DIN terminal and DC spec. are not available.

Valve

Rated voltage Note)

100 VAC 50/60 Hz200 VAC 50/60 Hz110 VAC 50/60 Hz220 VAC 50/60 Hz240 VAC 50/60 Hz

48 VAC 50/60 Hz230 VAC 50/60 Hz

Note) Refer to the Table (1) for the available combinations.

Nil2

ValveN.C.N.O.

Electrical entry

∗ Refer to the Table (1) for the available combinations between each electrical option and rated voltage.

∗ Surge voltage suppressor is integrated into the AC/Class B, built-in full-wave rectifier type as a standard.

G-Grommet C-Conduit

T -With conduit terminalTL -With conduit terminal

and light

D -DIN terminalDL -DIN terminal with lightDO-For DIN terminal

(without connector,gasket is included.)

Connector


voltage suppressor

C-Conduit


surge voltage suppressorTL -With conduit

terminal and light

TZ -With conduitterminal, surgevoltage suppressorand light





DO-For DIN terminal (without connector)

Connector


240 VAC 50/60 Hz48 VAC 50/60 Hz

230 VAC 50/60 Hz

14

Series VXK21/22/23For Air, Water, Oil, Steam

VXK-B.qxd 10.11.30 11:55 AM


Strainer

O-ring

Plug

Clip

Name plate

AZ-T-

For VX21: VX021N-10For VX22: VX022N-10For VX23: VX023N-10

� Clip Part No. (For N.C.)

For VX21: ETW-7For VX22: ETW-8For VX23: ETW-9

� Clip Part No. (For N.O.)

� Strainer Part No.

VXK021N-4-1VXK021N-3CA (NBR)

VXK021N-3CA-F (FKM)

VXK021N-3CA-E (EPDM)

VXK021N-3CA-P (PTFE)

VXK-OR (NBR)

VXK-OR-F (FKM)

VXK-OR-E (EPDM)

VXK-OR-P (PTFE)

Strainer

Plug assembly(Plug + O-ring)

∗ Part numbers are for a set of ten O-rings.

O-ring

� Name Plate Part No.

Valve modelEnter by referring to“How to Order” (Single Unit).

15


For Air, Water, Oil, Steam

Spec

ifica

tions

Fo

r A

irF

or

Oil

Dim

ensio

nsCo

nstru

ction

For W

ater

For S

team

VXK-B.qxd 10.11.30 11:55 AM


16

Solenoid Valve Flow Characteristics(How to indicate flow characteristics)

1. Indication of flow characteristicsThe flow characteristics in equipment such as a solenoid valve, etc. are indicated in their specifications as shown in the Table (1).

2. Pneumatic equipment2.1 Indication according to the international standards(1) Conformed standard

ISO 6358: 1989 : Pneumatic fluid power—Components using compressible fluids— Determination of flow-rate characteristics

JIS B 8390: 2000 : Pneumatic fluid power—Components using compressible fluids— How to test flow-rate characteristics

(2) Definition of flow characteristicsThe flow characteristics are indicated as a result of a comparison between sonic conductance C and critical pressure ratio b.Sonic conductance C : Value which divides the passing mass flow rate of an equipment in a choked flow condition by the

product of the upstream absolute pressure and the density in a standard condition.Critical pressure ratio b : Pressure ratio (downstream pressure/upstream pressure) which will turn to a choked flow when the

value is smaller than this ratio.Choked flow : The flow in which the upstream pressure is higher than the downstream pressure and where

sonic speed in a certain part of an equipment is reached.Gaseous mass flow rate is in proportion to the upstream pressure and not dependent on the downstream pressure.

Subsonic flow : Flow greater than the critical pressure ratioStandard condition : Air in a temperature state of 20°C, absolute pressure 0.1 MPa (= 100 kPa = 1 bar), relative humidity

65%.It is stipulated by adding the “(ANR)” after the unit depicting air volume.(standard reference atmosphere)Conformed standard: ISO 8778: 1990 Pneumatic fluid power—Standard reference atmosphere, JIS B 8393: 2000: Pneumatic fluid power—Standard reference atmosphere

(3) Formula for flow rateIt is described by the practical units as following.When P2 + 0.1———— ≤ b, choked flowP1 + 0.1

293Q = 600 x C (P1 + 0.1) ———— ·····························································(1) 273 + tWhen P2 + 0.1———— > b, subsonic flowP1 + 0.1

P2 + 0.1———— – bP1 + 0.1

Q = 600 x C (P1 + 0.1) 1 – —————— ———— ···························· (2) 1 – b

Q : Air flow rate [dm3/min (ANR)], dm3 (Cubic decimeter) of SI unit are also allowed to be described by l (liter). 1 dm3 = 1 l

2

293

273 + t

Indication by international standard

C, b

Other indications

S

Cv

Cv

Conformed standard

ISO 6358: 1989JIS B 8390: 2000

JIS B 8390: 2000Equipment: JIS B 8373, 8374, 8375, 8379, 8381

IEC60534-2-3: 1997JIS B 2005: 1995Equipment: JIS B 8471, 8472, 8473

ANSI/(NFPA)T3.21.3: 1990

Table (1) Indication of flow characteristics

AvProcess fluid control

equipment

Pneumatic equipment

Corresponding equipment

—

—

—

—

VXK-B.qxd 10.11.30 11:55 AM


P2

Q

P1

17

Solenoid Valve Flow Characteristics

C : Sonic conductance [dm3/(s·bar)]b : Critical pressure ratio [—]P1 : Upstream pressure [MPa]P2 : Downstream pressure [MPa]t : Temperature [°C]Note) Formula of subsonic flow is the elliptic analogous curve.Flow characteristics are shown in Graph (1) For details, please make use of SMC’s “Energy Saving Program”.

Example)Obtain the air flow rate for P1 = 0.4 [MPa], P2 = 0.3 [MPa], t = 20 [°C] when a solenoid valve is performed in C = 2 [dm3/(s·bar)] and b = 0.3.

293According to formula 1, the maximum flow rate = 600 x 2 x (0.4 + 0.1) x ————— = 600 [dm3/min (ANR)]

273 + 20

0.3 + 0.1Pressure ratio = ————— = 0.8

0.4 + 0.1Based on Graph (1), it is going to be 0.7 if it is read by the pressure ratio as 0.8 and the flow rate ratio to be b = 0.3.Hence, flow rate = maximum flow rate x flow rate ratio = 600 x 0.7 = 420 [dm3/min (ANR)]

(4) Test methodAttach a test equipment with the test circuit shown in Fig. (1) while maintaining the upstream pressure to a certain level which does not go below 0.3 MPa. Next, measure the maximum flow to be saturated in the first place, then measure this flow rate at 80%, 60%, 40%, 20% and the upstream and downstream pressure. And then, obtain the sonic conductance C from this maximum flow rate. Besides that, substitute each data of others for the subsonic flow formula to find b, then obtain the critical pressure ratio b from that average.

Graph (1) Flow characteristics

10.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

Flo

w r

ate

ratio

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1Pressure ratio (P2 + 0.1) / (P1 + 0.1)

b = 0.10.2

0.5

0.6

0.3

0.4

Airsupply

Pressure controlequipment

Filter Shut offvalve

ød3 ≥ 3d1

≥ 10d3 10d1

ød1

3d3

Thermometer

Pressure gauge orpressure convertor

Differential pressure gauge or differential pressure converter

Flow controlvalve

10d23d1 3d2

ød2

Flow meter

Pipe for measuringtemperature

Equipmentfor test

Fig. (1) Test circuit based on ISO 6358, JIS B 8390

Pipe formeasuring

pressure in theupstream side

Pipe formeasuring

pressure in thedownstream side

EquipmentC , b

VXK-B.qxd 10.11.30 11:55 AM


2.2 Effective area S(1) Conformed standard

JIS B 8390: 2000: Pneumatic fluid power—Components using compressible fluids— Determination of flow rate characteristicsEquipment standards: JIS B 8373: 2 port solenoid valve for pneumatics

JIS B 8374: 3 port solenoid valve for pneumaticsJIS B 8375: 4 port, 5 port solenoid valve for pneumaticsJIS B 8379: Silencer for pneumaticsJIS B 8381: Fittings of flexible joint for pneumatics

(2) Definition of flow characteristicsEffective area S : The cross-sectional area having an ideal throttle without friction deduced from the calculation of the pressure

changes inside an air tank or without reduced flow when discharging the compressed air in a choked flow, from an equipment attached to the air tank. This is the same concept representing the “easy to run through” as sonic conductance C.

(3) Formula for flow rate

When P2 + 0.1———— ≤ 0.5, choked flowP1 + 0.1 293Q = 120 x S (P1 + 0.1) ————··································································(3) 273 + tWhen

P2 + 0.1———— > 0.5, subsonic flowP1 + 0.1 293Q = 240 x S (P2 + 0.1) (P1 – P2) ————··············································(4) 273 + tConversion with sonic conductance C:S = 5.0 x C ·······································································································(5)Q : Air flow rate[dm3/min(ANR)], dm3 (cubic decimeter) of SI unit are also allowed to be described by l (liter). 1 dm3 = 1 lS : Effective area [mm2]P1 : Upstream pressure [MPa]P2 : Downstream pressure [MPa]t : Temperature [°C]Note) Formula for subsonic flow (4) is only applicable when the critical pressure ratio b is the unknown equipment. In the formula

(2) by the sonic conductance C, it is the same formula as when b = 0.5.

(4) Test methodAttach a test equipment with the test circuit shown in Fig. (2) in order to discharge air into the atmosphere until the pressure inside the air tank goes down to 0.25 MPa (0.2 MPa) from an air tank filled with the compressed air at a certain pressure level (0.5 MPa) which does not go below 0.6 MPa. At this time, measure the discharging time and the residual pressure inside the air tank which had been left until it turned to be the normal values to determine the effective area S, using the following formula. The volume of an air tank should be selected within the specified range by corresponding to the effective area of an equipment for test. In the case of JIS B 8373, 8374, 8375, 8379, 8381, the pressure values are in parentheses and the coefficient of the formula is 12.9.

V Ps + 0.1 293S = 12.1 — log10 (—————) —— ·················(6)

t P + 0.1 TS : Effective area [mm2]V : Air tank capacity [dm3]t : Discharging time [s]Ps : Pressure inside air tank

before discharging [MPa]P : Residual pressure inside air tank

after discharging [MPa]T : Temperature inside air tank

before discharging [K]

18

Power supply

Solenoid valve

Equipment for test

Rec

tifie

r tu

be in

the

dow

nstr

eam

sid

e

Rec

tifie

r tu

be in

the

upst

ream

sid

e

ThermometerPressure switch

Controlcircuit

Air tank

Pressure gaugeor pressureconvertor

Airsupply

Filter Shut off valve

Pressure control equipment

Timer (Clock)Pressure recorder

Fig. (2) Test circuit based on JIS B 8390


VXK-B.qxd 10.11.30 11:55 AM


19


2.3 Flow coefficient Cv factorThe United States Standard ANSI/(NFPA)T3.21.3:1990: Pneumatic fluid power—Flow rating test procedure and reporting method for fixed orifice componentsDefines the Cv factor of flow coefficient by the following formula which is based on the test conducted by the test circuit analogous to ISO 6358.

QCv = ——————————— ·········································································(7)

∆P (P2 + Pa)114.5 ——————

T1∆P : Pressure drop between the static pressure tapping ports [bar]P1 : Pressure of the upstream tapping port [bar gauge]P2 : Pressure of the downstream tapping port [bar gauge]:P2 = P1 – ∆PQ : Flow rate [dm3/s standard condition]Pa : Atmospheric pressure [bar absolute]T1 : Upstream absolute temperature [K]Test conditions are P1 + Pa = 6.5 ±0.2 bar absolute, T1 = 297 ±5K, 0.07 bar ≤ ∆P ≤ 0.14 bar.This is the same concept as effective area A which ISO 6358 stipulates as being applicable only when the pressure drop is smaller than the upstream pressure and the compression of air does not become a problem.

3. Process fluid control equipment(1) Conformed standard

IEC60534-2-3: 1997: Industrial process control valves. Part 2: Flow capacity, Section Three-Test proceduresJIS B 2005: 1995: Test method for the flow coefficient of a valveEquipment standards: JIS B 8471: Solenoid valve for water

JIS B 8472: Solenoid valve for steamJIS B 8473: Solenoid valve for fuel oil

(2) Definition of flow characteristicsAv factor: Value of the clean water flow rate represented by m3/s which runs through a valve (equipment for test) when the

pressure difference is 1 Pa. It is calculated using the following formula. ρAv = Q ————·····································································································(8) ∆P

Av : Flow coefficient [m2]Q : Flow rate [m3/s]∆P : Pressure difference [Pa]ρ : Density of fluid [kg/m3]

(3) Formula of flow rateIt is described by the practical units. Also, the flow characteristics are shown in Graph (2).In the case of liquid:

∆PQ = 1.9 x 106Av ————·······················································································(9) GQ : Flow rate [l/min]Av : Flow coefficient [m2]∆P : Pressure difference [MPa]G : Specific gravity [water = 1]

In the case of saturated steam:

Q = 8.3 x 106Av ∆P (P2 + 0.1) ··············································································(10)

Q : Flow rate [kg/h]Av : Flow coefficient [m2]∆P : Pressure difference [MPa]P1 : Upstream pressure [MPa]: ∆P = P1 – P2P2 : Downstream pressure [MPa]

VXK-B.qxd 10.11.30 11:55 AM


3

2

10.90.80.70.60.5

0.4

0.3

0.2

0.1

3

2

10.90.80.70.60.5

0.4

0.3

0.2

0.10.001 0.040.030.020.010.0040.0030.002 0.1

(4) Test methodAttach a test equipment with the test circuit shown in Fig. (3). Next, pour water at 5 to 40°C, then measure the flow rate with a pressure difference of 0.075 MPa. However, the pressure difference needs to be set with a large enough difference so that the Reynolds number does not go below a range of 4 x 104.By substituting the measurement results for formula (8) to figure out Av.

Conversion of flow coefficient:Av = 28 x 10–6 Kv = 24 x 10–6Cv ···········································································(11)Here, Kv factor: Value of the clean water flow rate represented by m3/h which runs through a valve at 5 to 40°C, when the pressure difference is 1 bar.Cv factor (Reference values): Value of the clean water flow rate represented by US gal/min which runs through a valve at 60°F, when the pressure difference is 1 lbf/in2 (psi).Value is different from Kv and Cv factors for pneumatic purpose due to different test method.

Example 1)Obtain the pressure difference when water 15 [l/min] runs through a solenoid valve with an Av = 45 x 10–6 [m2].Since Q0 = 15/45 = 0.33 [l/min], according to Graph (2), if reading ∆P when Q0 is 0.33, it will be 0.031 [MPa].

Example 2)Obtain the saturated steam flow rate when P1 = 0.8 [MPa], ∆P = 0.008 [MPa] with a solenoid valve with an Av =1.5 x 10–6 [m2].According to Graph (2), if reading Q0 when P1 is 0.8 and ∆P is 0.008, it is 0.7 [kg/h]. Hence, the flow rate Q = 0.7 x 1.5 = 1.05 [kg/h].

Graph (2) Flow characteristics

Sat

urat

ed s

team

flow

rate

Q0

[kg/

h] (w

hen

Av

= 1

x 10

–6 [m

2 ])

Pressure differential ∆P [MPa]

Wat

er fl

ow ra

te Q

0 [ l

/min

] (W

hen

Av

= 1

x 10

–6 [m

2 ])

Example 1

P1 = 0.1 MPa

P1 = 0.2 MPa

Upstream pressure

Example 2

P1 = 1 MPa

P1 = 0.8 MPa

P1 = 0.3 MPa

P1 = 0.5 MPa

P1 = 0.6 MPa

Fig. (3) Test circuit based on IEC60534-2-3, JIS B 2005

Thermometer

Restrictor in theupstream side

Flowmeter

Pressuretap

2d

≥ 20d

Test range

Equipmentfor test

Restrictor in thedownstream side

≥ 10d

6d

Pressuretap

P1 = 0.4 MPa

20


VXK-B.qxd 10.11.30 11:55 AM


Flow CharacteristicsNote) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to

pages 16 to 20.

Dow

nstr

eam

pre

ssur

e of

val

ve (

P2)

MP

a

1.0

0.8

0.6

0.4

0.2

0

1.0

0.9

0.05

0.1

0.150.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.950.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

VXK211�

VXK2�2�

VXK2�3�

VXK2 4�

VXK2 5�

32

32

VXK211�

VXK2�2�

VXK2�3�

VXK 4�

VXK 50

32

32

5

5 10 15 20 25 30

10 15 20 30 40 50 60

30 60

25 30

10 15

0.1

0.2

0.3

0.4

0.5

0.6

0.70.8

0.9

50 100 150 200 250 300 350

100 200 300 400 500 600

200 400 600 800 1,000 1,200

500 1,000 1,250

500 700

(663) (179)

(664) (183)

(662) (174)

(661) (170)

(660) (164)

(658) (158)

(656) (151)

(654) (143)

(650) (133)

(646) (120)

ø2

ø3

ø4.5

ø6

ø8

Air

Dow

nstr

eam

pre

ssur

e (P

2) M

Pa

Sonic

Critical

pressureSubsonic

Upstream pressure of valve P1 ≈ 1.0 MPa

Flow rate Q l/min (ANR)

How to read the graphThe sonic range pressure to generate a flow rate of 500 l/min (ANR) is P1 ≈ 0.14 MPa for a ø6 orifice (VXK2 4�) and P1 ≈ 0.3 MPa for a ø4.5 orifice (VX2�3�).

32

Saturated Steam

Upstream pressure of valve P1 ≈ 1.0 MPa

Subsonic

Sonic

Critical

pressure

Flow rate Q kg/h

( ): Saturated steam holding heat (kcal/kg) ( ): Saturation temperature (°C)

How to read the graphThe sonic range pressure to generate a flow rate of 15 kg/h isP1 ≈ 0.15 MPa for ø4.5 orifice (VXK2�3�S), P1 ≈ 0.37 MPa for ø3 orifice (VXK2�2�S), andP1 ≈ 0.82 MPa for ø2 orifice (VXK211�S). The holding heat slightly differs depending on the pressure P1, but at 15 kg/h it is approx. 9700 kcal/h.

21

ø2

ø3

ø4.5

ø6

ø8

VXK-B.qxd 10.11.30 11:55 AM


22

30

20

10

543

2

1

0.001 (0.0018) (0.0054) 0.01 (0.017) 0.05 (0.07)0.1

32

VXK211�ø232

VXK2 50 ø8

VXK2�2�ø3VXK2�3�ø4.5

VXK2 4�ø6

Flow Characteristics

Water

How to read the graphWhen a water flow of 2 l/min is generated, �P ≈ 0.017 MPa for a valve with ø3 orifice (VXK212�, 222�, 232�).

Pressure differential �P = (P1 – P2) MPa

Flo

w r

ate

Q l

/min

VXK-B.qxd 10.11.30 11:55 AM


Glossary of Terms

Pressure Terminology Others

1. Maximum operating pressure differentialThe maximum pressure differential (the difference between the inlet and outlet pressure) which is allowed for operation. When the outlet pressure is 0 MPa, this becomes the maximum operating pressure.

2. Minimum operating pressure differentialThe minimum pressure differential (the difference between the inlet pres-sure and outlet pressure) required to keep the main valve stably operating.

3. Maximum system pressureThe maximum pressure that can be applied inside the pipelines (line pressure).(The pressure differential of the solenoid valve portion must be less than the maximum operating pressure differential.)

4. Proof pressureThe pressure in which the valve must be withstood without a drop in perfor-mance after holding for one minute under prescribed pressure and returning to the operating pressure range. (value under the prescribed conditions)

5. 100 meshThe number of meshes over a length of 25.4 mm (1 inch).

1. MaterialNBR: Nitrile rubberFKM: Fluororubber – Trade names: Viton®, Dai-el®, etc.EPDM: Ethylene propylene rubberPTFE: Polytetrafluoroethylene resin – Trade names: Teflon®, Polyflon®, etc.

2. Oil-free treatmentThe degreasing and washing of wetted parts.

3. Passage symbolIn the JIS symbol ( ) IN and OUT are in a blocked condition ( ), but actually in the case of reverse pressure (OUT>IN), there is a limit to the blocking.( ) is used to indicate that blocking of reverse pressure is not possible.

Electrical Terminology

1. Apparent power (VA)Volt-ampere is the product of voltage (V) and current (A).Power consumption (W): For AC , W = V·A·cosθ. For DC, W = V·A.Note) cosθ shows power factor. cosθ = 0.6

2. Surge voltageA high voltage which is momentarily generated by shutting off the power in the shut-off area.

3. EnclosureA degree of protection defined in the “JIS C 0920: Waterproof test of electric machinery/appliance and the degree of protection against the intrusion of solid foreign objects”.

Verify the degree of protection for each product.

23

Example) IP65: Dusttight, Low jetproof type“Low jetproof type” means that no water intrudes inside an equipment that could hinder from operating normally by means of applying water for 3 minutes in the prescribed manner. Take appropriate protection measures, since a device is not usable in an environment where a droplet of water is splashed constantly.

Second characteristic numeral

IP

First characteristic numeral

� First Characteristics: Degrees of protection against solid foreign objects

0123456

Non-protectedProtected against solid foreign objects of 50 mm ø and greaterProtected against solid foreign objects of 12 mm ø and greaterProtected against solid foreign objects of 2.5 mm ø and greaterProtected against solid foreign objects of 1.0 mm ø and greaterDust-protectedDusttight

� Second Characteristics: Degrees of protection against water

012345678

Non-protectedProtected against vertically falling water dropsProtected against vertically falling water drops when enclosure tilted up to 15°Protected against rainfall when enclosure tilted up to 60°Protected against splashing waterProtected against water jetsProtected against powerful water jetsProtected against the effects of temporary immersion in waterProtected against the effects of continuous immersion in water

Dripproof type 1Dripproof type 2Rainproof typeSplashproof typeLow jetproof typeStrong jetproof typeImmersible typeSubmersible type

—

VXK-B.qxd 10.11.30 11:55 AM


Replacement of Strainer

1) Turn and remove the plug (width across flats of 27 mm).

2) Remove the strainer, and clean or replace it.3) Mount the O-ring on the plug and insert the

strainer to the end of the plug.4) Screw the plug into the body.

(Recommended tightening torque: 23 to 27 N·m)

1. The valve will reach high temperatures from high temperature fluids such as steam. Con-firm that the valve has cooled sufficiently before performing works.If touched inadvertently, there is a danger of being burned.

2. Shut off the fluid supply and release the fluid pressure in the system.

3. Shut off the power supply.

Warning

Strainer

O-ring

Plug

Series VXKSpecific Product Precautions 1Be sure to read before handling.Refer to back cover for Safety Instructions, “Handling Precautions for SMC Products” (M-E03-3) for 2 Port Solenoid Valves for Fluid Control Precautions.

Back page 1

VXK-B.qxd 10.11.30 11:55 AM


Replacement of Solenoid Coil

1. When replacing the solenoid coil, turn off the power supply.2. Be careful for possible high temperature of the solenoid coil due to the fluid temperature and

operating conditions.3. Check the type of the solenoid coil (size, rated voltage, voltage specification, insulation specifi-

cation).∗ Replacement of solenoid coil• Cannot be changed between DC and AC.• Cannot be changed between DC and AC (built-in full-wave rectifier type).• Can be changed from DC to DC.• Can be changed from AC to AC.

Warning

Clip

Solenoid coil

Name plate

E stop ring

Solenoid coil

Collar

Wave washer

Name plate

q

w

e

The removal of the clip will make it possible to remove the coil in direction w.

Pull out the clip horizontal-ly in direction q.∗ When doing this, do not apply

twisting or torsion to the clip. Otherwise, the clip may be de-formed. If the clip is deformed by mistake, replace it with a new one.

After replacement of the coil, attach the name plate so that its printed side is facing upwards, and press the clip horizontally in di-rection e.

Remove the E stop ring in direction q.

q

w

The removal of the E stop ring will make it possible to remove the coil in direction w.

e

After replacement of the coil, attach the name plate so that its printed side is facing upwards, and mount the collar, and then press the E stop ring horizontally in direction e.

Series VXKSpecific Product Precautions 2Be sure to read before handling.Refer to back cover for Safety Instructions, “Handling Precautions for SMC Products” (M-E03-3) for 2 Port Solenoid Valves for Fluid Control Precautions.

N.C. N.O.

Back page 2

VXK-B.qxd 10.11.30 11:55 AM


Akihabara UDX 15F, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, JAPANPhone: 03-5207-8249 Fax: 03-5298-5362URL http://www.smcworld.com© 2010 SMC Corporation All Rights Reserved

Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.

1st printing MY printing OZ 12450SZ Printed in Japan.D-DN

Safety Instructions Be sure to read “Handling Precautions for SMC Products” (M-E03-3) before using.

∗ Addition of plug assembly part no. to strainer part no.∗ Change of O-ring part no. in strainer part no.

OZ

Revision history

Edition B

1. The compatibility of the product is the responsibility of the person who designs the equipment or decides its specifications.Since the product specified here is used under various operating conditions, its compatibility with specific equipment must be decided by the person who designs the equipment or decides its specifications based on necessary analysis and test results. The expected performance and safety assurance of the equipment will be the responsibility of the person who has determined its compatibility with the product. This person should also continuously review all specifications of the product referring to its latest catalog information, with a view to giving due consideration to any possibility of equipment failure when configuring the equipment.

2. Only personnel with appropriate training should operate machinery and equipment.The product specified here may become unsafe if handled incorrectly. The assembly, operation and maintenance of machines or equipment including our products must be performed by an operator who is appropriately trained and experienced.

3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.1. The inspection and maintenance of machinery/equipment should only be

performed after measures to prevent falling or runaway of the driven objects have been confirmed.

2. When the product is to be removed, confirm that the safety measures as mentioned above are implemented and the power from any appropriate source is cut, and read and understand the specific product precautions of all relevant products carefully.

3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.

4. Contact SMC beforehand and take special consideration of safety measures if the product is to be used in any of the following conditions. 1. Conditions and environments outside of the given specifications, or use

outdoors or in a place exposed to direct sunlight.2. Installation on equipment in conjunction with atomic energy, railways, air

navigation, space, shipping, vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or other applications unsuitable for the standard specifications described in the product catalog.

3. An application which could have negative effects on people, property, or animals requiring special safety analysis.

4. Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a mechanical protective function, and periodical checks to confirm proper operation.

Warning

Limited warranty and Disclaimer/Compliance Requirements The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance Requirements”.Read and accept them before using the product.

1. The product is provided for use in manufacturing industries.The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary. If anything is unclear, contact your nearest sales branch.

Caution

Limited warranty and Disclaimer1. The warranty period of the product is 1 year in service or 1.5 years after

the product is delivered.∗2)

Also, the product may have specified durability, running distance or replacement parts. Please consult your nearest sales branch.

2. For any failure or damage reported within the warranty period which is clearly our responsibility, a replacement product or necessary parts will be provided. This limited warranty applies only to our product independently, and not to any other damage incurred due to the failure of the product.

3. Prior to using SMC products, please read and understand the warranty terms and disclaimers noted in the specified catalog for the particular products.

∗2) Vacuum pads are excluded from this 1 year warranty.A vacuum pad is a consumable part, so it is warranted for a year after it is delivered. Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or failure due to the deterioration of rubber material are not covered by the limited warranty.

Compliance Requirements1. The use of SMC products with production equipment for the manufacture of

weapons of mass destruction (WMD) or any other weapon is strictly prohibited.

2. The exports of SMC products or technology from one country to another are governed by the relevant security laws and regulations of the countries involved in the transaction. Prior to the shipment of a SMC product to another country, assure that all local rules governing that export are known and followed.

These safety instructions are intended to prevent hazardous situations and/or equipment damage. These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.” They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)∗1), and other safety regulations.

∗1) ISO 4414: Pneumatic fluid power – General rules relating to systems.ISO 4413: Hydraulic fluid power – General rules relating to systems.IEC 60204-1: Safety of machinery – Electrical equipment of machines.

(Part 1: General requirements)ISO 10218-1: Manipulating industrial robots - Safety.etc.

Caution indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

Warning indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.

Caution:

Warning:

Danger :Danger indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

Safety Instructions

VXK-B.qxd 10.11.30 11:55 AM


vxk-b.qxd 10.11.30 11:55 am page 1 2 port …12 apparent power (va)∗ 55 60 65 temperature rise (c...

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